Examples with ServiceProvider org.lanternpowered.server.inject.ServiceProvider used on opensource projects

Example 1 with ServiceProvider

use of org.lanternpowered.server.inject.ServiceProvider in project LanternServer by LanternPowered.

the class ServiceObjectProvider method get.

@SuppressWarnings("unchecked")
@Override
public Service get() {
    // noinspection unchecked
    final Class serviceType = this.point.getType().resolveType(VALUE_VARIABLE).getRawType();
    if (serviceType == null) {
        throw new IllegalStateException("Missing service type.");
    }
    final ServiceProvider serviceProvider = this.point.getAnnotation(ServiceProvider.class);
    final Service service = () -> {
        final Optional<ProviderRegistration> optRegistration = this.serviceManager.getRegistration(serviceType);
        return optRegistration.orElseThrow(() -> new IllegalStateException("Cannot find the service: " + serviceType.getName()));
    };
    final Optional<ProviderRegistration> optRegistration = this.serviceManager.getRegistration(serviceType);
    if (serviceProvider == null || (!serviceProvider.override() && optRegistration.isPresent())) {
        return service;
    }
    final Class<?> provider = serviceProvider.value();
    final Object serviceInstance;
    if (Provider.class.isAssignableFrom(provider)) {
        serviceInstance = ((Provider) this.injector.getInstance(provider)).get();
    } else if (Supplier.class.isAssignableFrom(provider)) {
        serviceInstance = ((Supplier) this.injector.getInstance(provider)).get();
    } else if (serviceType.isAssignableFrom(provider)) {
        serviceInstance = this.injector.getInstance(provider);
    } else {
        throw new IllegalStateException(String.format("Invalid service instance provider %s for %s", serviceType.getName(), provider.getName()));
    }
    if (!serviceType.isInstance(serviceInstance)) {
        throw new IllegalStateException(String.format("The provided service instance %s doesn't implement the service %s", serviceInstance.getClass().getName(), serviceType.getName()));
    }
    this.serviceManager.setProvider(this.pluginContainer, serviceType, serviceInstance);
    return service;
}